Rack for pipettes



FIG. 1 is a perspective view of a rack for pipettes showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plane view thereof; and,

FIG. 4 is a bottom plane view thereof.

The right, left and rear views of the design are identical to the front view and therefore omitted. 

We claim the ornamental design for a rack for pipettes, as shown and described. 